How to use the Split function in Java

There are also String.Split () methods in the Java.lang package, similar to. NET, where returns are a character array, but there are a few tricks to use. I would like to introduce the following, the need for friends can refer to the  

If executed: "2|33|4". Split ("|")
The result is:
""
2

3
3

4
Strange, but take a look at the API instructions or know why.
The
Java.lang.string.split
Split method
splits a string into substrings and then returns the result as an array of strings.
Stringobj.split ([Separator,[limit]])
parameter
stringobj
the required option. The String object or text to be exploded. The object is not modified by the split method.
Separator
is optional. A string or regular expression object that identifies whether one or more characters are used to delimit a string. If this option is omitted, an array of single elements containing the entire string is returned. The
limit
option. This value is used to limit the number of elements returned in an array.
Description The result of the
split method is an array of strings, where each occurrence of the separator in the stingobj is decomposed

so the normal way to do this is:
1, if you use "." As a separate word, it must be written as follows: String.Split (".") so that the correct separation can be separated from the String.Split (".");
2, if you use "|" As a separate word, it must be written as follows: String.Split ("|") so that the correct separation can be separated from the string.split ("|");
"." and "|" Are all escape characters and must be added "";
3, if you have more than one separator in a string, you can use the "|" As hyphens, such as: "A=1 and b =2 or c=3", separate all three, can be String.Split ("And|or");